23101021 has 2 divisors, whose sum is σ = 23101022. Its totient is φ = 23101020.

The previous prime is 23100991. The next prime is 23101049. The reversal of 23101021 is 12010132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23088025 + 12996 = 4805^2 + 114^2 .

It is a cyclic number.

It is not a de Polignac number, because 23101021 - 2⁵ = 23100989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23100989 and 23101007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23101921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11550510 + 11550511.

It is an arithmetic number, because the mean of its divisors is an integer number (11550511).

Almost surely, 2^23101021 is an apocalyptic number.

It is an amenable number.

23101021 is a deficient number, since it is larger than the sum of its proper divisors (1).

23101021 is an equidigital number, since it uses as much as digits as its factorization.

23101021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 23101021 is about 4806.3521510601. The cubic root of 23101021 is about 284.8024526166.

Adding to 23101021 its reverse (12010132), we get a palindrome (35111153).

The spelling of 23101021 in words is "twenty-three million, one hundred one thousand, twenty-one".